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Custom IQ - SOQPSK

Quick Setups

Use this Closeddrop-down menu to select a modulation type from several supported formats. A single data segment using that modulation type appears in the segment list below. Click the cell in the Constellation column to open the Constellation Setting window, providing a graphical display and editing features (video). Quick setups enable you to configure complex signals for signal generation, equivalent to 89600B VSA setups in signal analysis.

Quick Setups IQ Settings

Standard

Modulation

Symbol Rate

Filter

APCO25

C4FM

4FSK (0.6 kHz, 1.8 kHz, -0.6 kHz, -1.8 kHz)

4.8 ksps

NYQ (0.2) + 1/Sinc

CQPSK*

Pi/4 DQPSK

4.8 ksps

NYQ

HCPM

4FSK (1 kHz, 3 kHz, -1 kHz, -3 kHz)

6 ksps

APCO25 HCPM

HDQPSK

Pi/4 DQPSK

6 ksps

APCO25 HDQPSK

TETRA

Pi/4 DQPSK

18 ksps

RNYQ (0.35)

NXDN

4800 bps

4FSK (0.35 kHz, 1.05 kHz, -0.35 kHz, -1.05 kHz)

2.4 ksps

RNYQ (0.2) + Sinc

9600 bps

4FSK (0.8 kHz, 2.4 kHz, -0.8 kHz, 2.4 kHz)

4.8 ksps

RNYQ (0.2) + Sinc

dPMR

4FSK (0.35 kHz, 1.05 kHz, -0.35 kHz, -1.05 kHz)

2.4 ksps

RNYQ (0.2)

DECT

2FSK (-288 kHz, 288 kHz)

1.152 Msps

Gaussian (0.5)

DMR

4FSK (0.648 kHz, 1.944 kHz, -0.648 kHz, -1.944 kHz)

4.8 ksps

RNYQ (0.2)

ARIB

T98/T61*

Pi/4 DQPSK

9.6 ksps

RNYQ (0.2)

T102

4FSK (0.33 kHz, 0.99 kHz, -0.33 kHz, -0.99 kHz)

4.8 ksps

ARIB T102 RNYQ (0.2) + Gaussian (0.769)

Zigbee

BPSK

BPSK

600 ksps

NYQ (1)

OQPSK

OQPSK

1 Msps

Half Sine

WiSUN

2FSK 50/1

2FSK (-25 kHz, 25 kHz)

50 ksps

Gaussian (0.5)

2FSK 100/0.5

2FSK (-25 kHz, 25 kHz)

100 ksps

Gaussian (0.5)

ITU-T G.9959

R2

2FSK (-20 kHz, 20 kHz)

40 ksps

Rectangle

R3

2FSK (-29 kHz, 29 kHz)

100 ksps

Gaussian (0.6)

* For APCO25 CQPSK and ARIB T98/T61, the ALC is set to off to achieve better EVM. For all other cases, the ALC is on.

Payload, Idle Interval, Ramp Symbols, and Number of Symbols will be set to default values.

1. Custom IQ Selection

Custom IQ Type

Choices: ASK & PSK & QAM | FSK | SOQPSK | ARTM Multi-h CPM

Default: ASK & PSK & QAM

Select the type of Custom IQ.

SOQPSK Settings

Symbol Rate

Range: 1 kHz to 1 GHz

Default: 1 MHz

Set the symbol rate of SOQPSK signal.

Payload Data

Choices: PN9 | PN15 | PN23 | Custom Bit Pattern | User File

Default: PN9

Opens the ClosedData Setup editor to configure payload bits.You can also load, save, and create custom bit patterns.

Payload Data Length

Range: 100 to 100000

Default: 1000

Set the length of payload data in bits, it must be an even number.

SOQPSK-TG Parameters

Rolloff Factor (ρ)

Range: 0.1 to 1

Default: 0.7

Set the rolloff factor of the shaping filter.

Time Scaling Factor (B)

Range: 0.1 to 5.0

Default: 1.25

Set the scaling factor (B) of the shaping filter.

Window Time T1

Range: 0.1 to 5.0

Default: 1.5

Set the window time T1 of the shaping filter.

Window Time T2

Range: 0.1 to 5.0

Default: 0.5

Set the window time T2 of the shaping filter.